ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

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Bardolino Development Environmental Statement Under the conditions modelled, no crude or diesel is expected to beach. Modelling using the OSIS spill model indicates that the 50 m 3 spill is expected to disperse naturally within 75 hours, and the 1,000 tonne diesel spill would disperse within 8 hours of release. Figure 6.8: Volumes of oil in different phases over time for the Bardolino pipeline deterministic run. Oil Volume (m³) 150.00 125.00 100.00 75.00 50.00 25.00 0.00 0.00 25.00 50.00 75.00 Time (h) Slick Volume Evaporated Volume Dispersed Volume Beached Volume Figure 6.9: Volumes of oil in different phases over time for the Bardolino diesel tank deterministic run. Oil Volume (m³) 800.00 700.00 600.00 500.00 400.00 300.00 200.00 100.00 0.00 0.00 1.00 2.00 3.00 4.00 Time (h) 5.00 6.00 7.00 8.00 Slick Volume Evaporated Volume Dispersed Volume Beached Volume Page 6-38 April 2008
Bardolino Development Environmental Statement Figure 6.10: Deterministic modelling results for the instantaneous release of 50 m 3 of crude oil (dark blue lines indicate territorial boundaries) Figure 6.10 shows the results from the deterministic modelling of an instantaneous 50 m 3 spill of crude oil. Under these conditions, modelling indicates that approximately 75 hours after release all of the oil would have dispersed naturally, and no crude oil would be expected to beach. 6.9.3 Impact on sensitive receptors and proposed or designated sites The potential risk to birds from oil and diesel pollution is through damage to feathers resulting in loss of mobility, buoyancy, insulation and waterproofing. Birds may also be at risk from toxicity through ingestion of hydrocarbons and may face starvation through depletion of food sources. The birds most affected are those, such as guillemots, razorbills and puffins, that spend large amounts of their time on the water, particularly during the moulting season when they become flightless (DTI, 2001). Seabird vulnerability to oil pollution in the Bardolino area is “high” to “very high” during July, September, October and November, with “moderate” to “low” seabird vulnerability for the remainder of the year (JNCC, 1999; Section 4.4.5). High seabird vulnerability is attributable to the high numbers of guillemot and little auk in this part of the central North Sea (UKDMAP, 1998). The Bardolino development activities are scheduled to occur between February and August 2009, which coincides with periods of high seabird vulnerability. The potential impact on seabirds is considered to be minimal, however, because the likely spills would be of diesel rather than crude oil, and any spilled diesel would be rapidly dispersed offshore. Major oil spills can result in direct mortality to marine mammals, although, generally, they are less vulnerable than seabirds to fouling by oil. Cetaceans have smooth hairless skins over a thick layer of insulating blubber, so oil is unlikely to adhere persistently or cause a breakdown in insulation. However, they are at risk from chemicals evaporating from the surface of an oil slick at sea, especially within the first few days; they may inhale vapours given off by spilt oil and their eyes may be vulnerable to major pollution, and individuals may drown as a result of associated symptoms. Neonatal (very young) seal pups are particularly at risk from oil coming ashore. In addition, a major release of oil or diesel may deplete marine mammals’ food supply (SMRU, 2001). April 2008 Page 6-39
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Page 181 and 182: 13 th March 2008 Dear Sir or Madam,
Page 183 and 184: To: Paul Wood Shell U.K Limited, Se
Page 195 and 196: What risks to marine mammals do pil
Page 197 and 198: Noise propagation modelling. Noise
Page 199 and 200: If, for any reason, piling operatio
Page 201 and 202: APPPENDIX 1 MARINE MAMMAL RECORDING
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ENVIRONMENTAL STATEMENT BARDOLINO DEVELOPMENT

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